K Jet - Injectors not squirting after head removal

[bmouthboyo]

Hello again all,

After some fault finding I have put the problem of my DX engine not starting down to the 4 injectors are not giving any fuel. The cold start line is however.

The engine was working fine before I removed the head to have a stud removed, all refitted with timing correct (well same as before) and new gasket and bolts.

I have not tampered with anything else and fuel is obviously being pumped as the cold start has a lot of pressure as its ment to but the injectors have non. I have even removed the actual injector incase blocked and still no fuel so must be some thing to do with how its dispensed at teh air filter housing.

Any ideas?

Thanks

[Wayne]

Is the pump running.

[bmouthboyo]

Yes the pump is running fine.

Few other points that might be of use:

Only about half a litre of oil in the engine as i wanted to ensure it ran before doing the usual service incase i have to take apart again.
No coolant in system.

Engine is in a T25 Camper and has been sat still unran for 5 years. When I bought it a few months back it was running but had cracked manifold, hence all this agro removing head etc.

Other than the head I havnt fidled with anything. I read somewere if the air filter housing isnt tight it can prevent it pumping?

Only saving grace is the cold start line is workign correctly

[Wayne]

With the ign on and one injector sat in a glass jar, leave the other 3 in the head for now, if you lift the metering flap it should deliver fuel if not then metering head has problem or injectors

[dirtydub]

As above. I would say its ur metering head. Dont think they like to be stood for to long and tend to seize up or get full of old sludgy petrol

[rubjonny]

With the ign on and one injector sat in a glass jar, leave the other 3 in the head for now, if you lift the metering flap it should deliver fuel if not then metering head has problem or injectors

you'll need to bridge the fuel pump relay so the pump runs continuous, ignition on wont be enough.  Also a bad idea to do this test with the other injectors in the head still as it'll flood the engine

[Wayne]

With the ign on and one injector sat in a glass jar, leave the other 3 in the head for now, if you lift the metering flap it should deliver fuel if not then metering head has problem or injectors

you'll need to bridge the fuel pump relay so the pump runs continuous, ignition on wont be enough.  Also a bad idea to do this test with the other injectors in the head still as it'll flood the engine

Point taken but not many people have 4 glass tubes lying around.

[rubjonny]

or just chuck all 4 into a big container, atm we're just testing they work and for good spray pattern, rather than going as  far as checking delivery volumes

[rubjonny]

but yeah you're right, ideally we want 4 equal sized tubes so we can check the delivery volume at the same time, but just konwing if they're buggered or not is a start

I had exactly this on my 16v, turned out to be a clogged fuel filter, so worth a go if not replaced recent. fuel was getting to the metering head but not enough pressure could build up to open the injectors

[bmouthboyo]

Ah great thanks for the advice.

The pump is a "bespoke" one lol, basically to turn it on i have to turn the side lights on, dont ask me why, soon as its running im getting an auto spark to wire it properly. So basically I can easily get it to run all the time.

I have removed 2 of the injectors and there not giving fuel from trying to start it normally.

Regarding the fuel filter causeing lack of presure to open the injectors, i have even removed the fuel line from the housing at the air filter end and it doesnt come out.

How do I manually lift the metering flap?

Thanks